Question

Copper is ________useful metal. 
a)The
b)An
c)A
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Answer 1

Answer:

Copper is __an______useful metal. 

Explanation:

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Answer 2

Copper is a useful metal.

because 'A' is used even though useful starts with vowel because the sound is a consonant sound, there is a 'y' sound when we pronounce useful. We use 'a' when a word starts with a consonant letter and 'an' when it starts with a vowel.

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